Okay I want to chime in.. If I want to reload 9mm and .223 or 5.56mm in particular what do I need? Dillion? Progressive? or RCBS?
I'm a fan of RCBS, but I still say in progressives the Hornady Lock N Load is a great piece of equipment. Dillion is good, assuming you have lots of money to spend.
For Single Stage, it's really all the same slow chunk-a-chunk of step by step processing brass. Single stage is great for learning the process, and/or precision rounds. Precision rifle pretty much requires a single stage.
That said, many people hate reloading .223 because you tend to go through more .223 then other rifle calibers, it's relatively cheap to buy (we'll see how long that lasts), and easy to get a hold of, plus there are a lot of extra steps and specialized equipment you need to properly reload rifle rounds. Rifle is a different animal than pistol due to necked down brass, brass stretching, higher power, etc.
Now, if you're willing to go through all the steps of processing your .223 brass, you can save 30%-40% reloading it yourself if you buy your components in bulk, and you can easily reload decent ammo on a progressive press, just like you would pistol rounds (assuming you process the brass).
So, if you're shooting a lot, willing to pony up the extra cash for equipment to process and maintain your .223 brass, and are shooting only pistol and .223, a progressive is a great choice.
Just using some very general round numbers. Lets say you drop $1000 on a balls out kick ass progressive reloading setup. Lets say you're a smart (bulk) component buyer and you save 50% on your reloads compared to great price on bulk factory ammo - so lets call it $100 per 1000 9mm and $150 per 1000 .223. It will take you (roughly) 5000 9mm and 3300 .223 (combined) to pay off your gear. Everything after that is cheap reloading.